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PN Junction Diode – 1 – 7

31. The dynamic resistance r of a diode varies as :

(a) 1/I
(b) 1/I2
(c) I
(d) I2

ANSWER

EXPLANATION

32. The reverse saturation current in germanium diode is of the order of :

(a) 1 nano amps
(b) 1 micro amps
(c) 1 milli amps
(d) 1 kilo amps

ANSWER

EXPLANATION

33. The diode capacitance has ……… temperature coefficient and the figure of merit has ……… temperature coefficient.

(a) Positive, Positive
(b) Negative, Negative
(c) Positive, Negative
(d) Negative, Positive

ANSWER

EXPLANATION

34. Peak inverse voltage of the diode is found to be :

(a) Greater or equal to Vm
(b) Small or equal to Vm
(c) Equal to Vm
(d) Not equal to Vm

ANSWER

EXPLANATION

35. Consider the statements
1. Ideal diode conducts with zero resistance when forward biased.
2. Ideal diode appears as an infinite resistance when reverse biased.

(a) Only 1 is correct
(b) Only 2 is correct
(c) Both 1 & 2 are correct
(d) Either 1 or 2 is correct

ANSWER

EXPLANATION

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